Improved bit-stock



UNITED STATES PATENT OFFICE.

SAMUEL U. KING, OF VVINDSOR,VERMONT.

IMPROVED BIT-STOCK.

Specification forming part of Letters Patent No. 39, 5 l, (lated July7', 1863.

To @ZZ whom it may concern,.-

Beitknown that I` SAMUEL U. KING, a resident ot" Vindsor, in the countyot' Vindsor and State of Vermont, have invented a new and usefulImprovement in the Bit-Stock and I do hereby declare the same to befully described in the following specification and represented in theaccompanying drawings, of Which- Figure l is a side view, and Fig 2 alongitudinal section, ot' a bit-stock provided with my invention.

The said invention orimprovement consists in making the stock not onlywith a pivot on its head and a step or bearing therefor in the handle,or with the bearing or step in the head and the pivot projecting fromthe han dle, but with the handle applied to the stock by means of anadjustable sleeve screwed to the handle and held in place by means, andprovided with an oil-chamber, substantially as hereinafter described.

In the drawings, A is the bit-stock, of which a is the handle, and b thecranked shank. At the upper end of the latter there is a conical pivot,c, which works against a metallic bearing or step, d, inserted and fixedin the handle a. This handle, which is made of lignum vitae, is securedto the upper part otl a tube or sleeve, e, which encompasses the shankand is furnished with a chamber,f, for the reception of a metallicvWasher, g, which is placed on the shank, and is secured in place by apin, h, which goes through the shank. The Washer and the bottom part, i,of the chamber f cooperate in preventing the sleeve from being drawn oftthe shank. The sleeve, however, slides freely in a longitudinaldirection on the shank, and thus by so doing enables the bearing andpivot to remain in contact as they may become worn. The chamberfservesalso as an oil chamber or receptacle for containing or receiving a iuidfor lubricating both the pivot and bearing, as Well as the sleeve andshank, Where they may be in contact.

By making and applying the bitstock and handle in manner as describedthe usual friction and wear of the handle on a shoulder of the shank areavoided, and the shank can be revolved with little interference fromfriction. Besides this, the bearing parts can readily accommodatethemselves to one another as they may become worn.

I claim- The improved bit-stock as having the shank and handle pivotedtogether, as described,

combined with a chambered sleeve, made4 and applied to both in mannerand so as to operate therewith substantially as specified.

SAMUEL U. KING. Witnesses:

MARY C. BUTLER, GARLos OooLIDGE.

